CN201974504U - Nondestructive withstand voltage tester - Google Patents
Nondestructive withstand voltage tester Download PDFInfo
- Publication number
- CN201974504U CN201974504U CN2010206682872U CN201020668287U CN201974504U CN 201974504 U CN201974504 U CN 201974504U CN 2010206682872 U CN2010206682872 U CN 2010206682872U CN 201020668287 U CN201020668287 U CN 201020668287U CN 201974504 U CN201974504 U CN 201974504U
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- resistance
- darlington transistor
- contact
- connects
- resistant tester
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Abstract
The utility model discloses a nondestructive withstand voltage tester, which has the technical scheme that a bridge rectifier filter circuit comprises an isolation transformer, a rectifying bridge and a capacitor, and the output end of the bridge rectifier filter circuit is connected with a constant current circuit comprising a resistor, a Darington tube and a plurality of diodes; and contacts connected with a tested device and a voltmeter are arranged on the constant current circuit. The nondestructive withstand voltage tester has high safety, low cost and wide application range, will not deteriorate the properties of the device, and is safe and convenient to use.
Description
Technical field
The utility model relates to a kind of detecting instrument of electronic component, especially is a kind of harmless pressure-resistant tester.
Background technology
Voltage breakdown is one of most important parameter of electronic component.The general at present pressure-resistant tester that adopts is the reverse voltage that raises gradually by providing to electronic component, and when the electric current of the electronic component of flowing through arrived setting, voltage at this moment was the voltage breakdown of the element of surveying.Present withstand voltage test instrument circuit more complicated, cost is higher, and work the time has high pressure, and operation has certain danger, secondly is to be variable to the reverse voltage that electronic component applies, destructible electronic component primary characteristic in the test process.
The utility model content
For overcoming the prior art deficiency, the utility model provides a kind of harmless pressure-resistant tester.
For realizing above-mentioned technical purpose, the utility model is achieved through the following technical solutions:
Voltage breakdown is defined as in practice process: under the test environment of regulation, device is under the effect of reverse voltage, and the inverse current value of passing through is a setting, and this reverse voltage promptly is the voltage breakdown of this device.
The utility model adopts above-mentioned physical characteristics to design, a kind of harmless pressure-resistant tester, comprise a testing table, it is characterized in that: be provided with in the testing table by isolating transformer, rectifier bridge, the bridge rectifier filter circuit that electric capacity constitutes, for detector provides high voltage direct current, the output terminal of bridge rectifier filter circuit connects resistance R 1 and contact A1, resistance R 1 connects the base stage of Darlington transistor and some diodes of series connection, the collector terminal of Darlington transistor is connected with contact A2, the emitter of Darlington transistor connects resistance R 2, resistance R 2 and terminal diode common ground, contact A1, be provided with voltage table between A2.
The live wire that described isolating transformer connects is provided with safety switch, is provided with pilot lamp between live wire beyond the safety switch and the zero line.
Be provided with pilot lamp between described contact A2 and Darlington transistor.
Be provided with pilot lamp between described resistance R 1 and Darlington transistor.
When tested electronic component negative pole is connected with contact A 1, after anodal and contact A 2 connects, measured device, Darlington transistor, resistance R 1, R2, some diodes constitute constant-current source circuit, by regulating the resistance of resistance R 2, make the constant current value of the measured device of flowing through equal measured device inverse current setting; The magnitude of voltage that the voltage table that this moment, the measured device two ends connected shows is the voltage breakdown of measured device.
The utility model is compared with conventional art, has following beneficial effect: adopt isolating transformer to isolate AC network, the safety switch breakpoint is arranged on the live wire, and circuit is provided with a plurality of circuit state pilot lamp, has guaranteed the security of service test instrument; The design of employing constant current source, the measured device both end voltage is adjusted into voltage breakdown automatically, can not cause damage to device property, and is with low cost, safe and convenient to use, has wide range of applications.
Description of drawings
Accompanying drawing is the utility model circuit diagram.
Among the figure, GLBY, isolating transformer, FG1, FG2, FG3, light emitting diode, A1, A2, A6, A7, contact, R1, R2, R3, resistance, T1, T2, NPN triode, AN, safety switch, C, electric capacity.
Embodiment
Referring to accompanying drawing, be provided with the bridge rectifier filter circuit that constitutes by isolating transformer GLBY, rectifier bridge, capacitor C in the testing table, for detector provides high voltage direct current, live wire and zero line that isolating transformer GLBY connects by contact A7, A6, and in contact A7, being provided with safety switch AN, being used to of being provided with between contact A7, the A6 that resistance R 3 and light emitting diode FG3 constitute shows the whether pilot lamp of incoming transport electricity of testing table; The output terminal of bridge rectifier filter circuit connects resistance R 1 and contact A1, the base stage of resistance R 1 connection Darlington transistor and diode in series D1, D2, D3, be provided with the testing table electriferous state pilot lamp that light emitting diode FG1 constitutes between resistance R 1 and Darlington transistor, the collector terminal of Darlington transistor is connected with contact A2, and between is provided with the pilot lamp of the demonstration detected element access state of light emitting diode FG2 formation, the emitter of Darlington transistor connects resistance R 2, resistance R 2 and terminal diode common ground are provided with voltage table between contact A1, A2.Described Darlington transistor is formed by NPN triode T1, T2 connection.
When tested electronic component negative pole is connected with contact A 1, after anodal and contact A 2 connects, measured device, Darlington transistor, resistance R 1, R2, diode D1, D2, D3 constitute constant-current source circuit; Flow through constant current value I0=(between A3A5 between voltage-A3A4 the voltage)/R2 of detected element,, make the constant current value i0 of the measured device of flowing through equal measured device inverse current setting by regulating the resistance of resistance R 2; The magnitude of voltage that the voltage table that this moment, the measured device two ends connected shows is the voltage breakdown of measured device.Measured device inverse current setting can be found or provided by manufacturer by relevant criterion.
Claims (5)
1. harmless pressure-resistant tester, comprise a testing table, it is characterized in that: be provided with the bridge rectifier filter circuit that constitutes by isolating transformer, rectifier bridge, electric capacity in the testing table, the output terminal of bridge rectifier filter circuit connects resistance (R1) and contact (A1), resistance (R1) connects the base stage of Darlington transistor and some diodes of series connection, the collector terminal of Darlington transistor is connected with contact (A2), the emitter of Darlington transistor connects resistance (R2), resistance (R2) and terminal diode common ground are provided with voltage table between contact (A1), (A2).
2. a kind of harmless pressure-resistant tester according to claim 1 is characterized in that: the live wire that isolating transformer connects is provided with safety switch, is provided with pilot lamp between live wire beyond the safety switch and the zero line.
3. a kind of harmless pressure-resistant tester according to claim 1 is characterized in that: be provided with pilot lamp between described contact (A2) and Darlington transistor.
4. a kind of harmless pressure-resistant tester according to claim 1 is characterized in that: be provided with pilot lamp between described resistance (R1) and Darlington transistor.
5. a kind of harmless pressure-resistant tester according to claim 1 is characterized in that: described Darlington transistor is formed by NPN triode (T1), (T2) connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206682872U CN201974504U (en) | 2010-12-20 | 2010-12-20 | Nondestructive withstand voltage tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206682872U CN201974504U (en) | 2010-12-20 | 2010-12-20 | Nondestructive withstand voltage tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201974504U true CN201974504U (en) | 2011-09-14 |
Family
ID=44579604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206682872U Expired - Fee Related CN201974504U (en) | 2010-12-20 | 2010-12-20 | Nondestructive withstand voltage tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201974504U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207356A (en) * | 2012-11-22 | 2013-07-17 | 山东明华光电科技有限公司 | High-voltage lossless dielectric strength tester |
| CN103852696A (en) * | 2012-11-30 | 2014-06-11 | 海洋王（东莞）照明科技有限公司 | Element voltage-withstand detection circuit, voltage-withstand test device and test method |
-
2010
- 2010-12-20 CN CN2010206682872U patent/CN201974504U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207356A (en) * | 2012-11-22 | 2013-07-17 | 山东明华光电科技有限公司 | High-voltage lossless dielectric strength tester |
| CN103852696A (en) * | 2012-11-30 | 2014-06-11 | 海洋王（东莞）照明科技有限公司 | Element voltage-withstand detection circuit, voltage-withstand test device and test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20111220 |